User Account classification based on machine learning based on e-mail addresses and other account information

A method implemented by a computer, comprising: receiving (202; 402) information associated with an account, including information an e-mail: extracting (204; 404) one or more characteristics of the information associated with the account, wherein at least one of the one or more characteristics is based on the ability to be stored in the email address, the ability to be stored at a pattern that includes symmetric, anti-symmetric or separate characters uniformly in the direction being referred of e-mail; and determining (206; 408) a confidence level of at least partially based on the extracted features.